JPS5827633Y2 - pruning machine - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a pruning machine used for cutting branches of trees such as cedar and cypress.

The inventor of the present invention has devised a cutting device that allows an operator to cut branches at high places while remaining on the ground, and has already filed an application for the same.

Utility Application No. 53-20197 (Utility Application No. 54-123361
Publication No.).

As shown in Fig. 5, this device is equipped with a drive box b at the tip of a long operating rod a into which a transmission shaft is inserted, and a cutting tool C is attached to this box b, while the rear end of the operating rod a is A forearm base support d is provided at the base of the forearm, a pair of right and left grips e and f are provided in front of this support, and a motor g is further provided at the base of the operating rod a.

Thus, the worker standing on the ground supports the forearm base support d and the grip e with one hand, and the grip f with the other hand, while
Work can be performed by directing the cutting tool C toward the branch to be felled.

Although this device has the advantage of being able to perform pruning work from the ground, it has the disadvantage of being limited in the height of the object to be felled.

In addition, in this device, since the operation rod a is formed to be quite long, the distance between the machine support point of one worker and the drive box/cutting tool c is quite large, and the drive box b Since the weight of the machine is a dog, a strong moment P as shown by the arrow is generated, which causes poor operability, causes great fatigue to the worker, and has the disadvantage that it cannot withstand long hours of work.

In pruning work of cedar, cypress, etc., it is required to completely cut the base of the branch along the trunk, but according to the above device, the cutting tool C can be placed parallel to the trunk. It was almost impossible to do so, and it was difficult to perform the desired pruning work.

Furthermore, if you work while routing the long operation tube a into which the transmission shaft is inserted, lateral vibration will occur, and the high speed rotation of the transmission shaft etc. will be added to this, resulting in severe vibration. The power loss during transmission was also significant, and it also had the disadvantage of poor energy efficiency.

The present invention was devised in view of the above.

The purpose is to provide a pruning machine that corrects the above-mentioned drawbacks, has excellent safety, has a simple structure, and can perform perfect pruning work, and is driven once back and forth by a power source. The movable cylinder is fitted into the outer cylinder of the pruning machine body.

This occurs when a free piston is fitted into the movable cylinder so that its tip striking rod protrudes from a hole provided at the distal end of the movable cylinder, and the movable cylinder is driven reciprocally.

A cutting tool in which the free piston is caused to reciprocate at high speed by a pneumatic chamber formed by the inner wall of the movable cylinder and the free piston, and the striking rod of the free piston is provided at the front end of the branching machine body. In a pruning machine configured to strike the shaft end of the cutting tool, the shaft of the cutting tool is slidable only in the axial direction and not rotatable in a holder rotatably attached to the front end of the outer cylinder. By supporting
The cutting tool is attached to the tip of the branching machine main body, and a grip is attached to the connecting part of the support holder, and the main body connecting part is connected from the grip to the rear part of the operator's forearm by approximately the same length as the operator's forearm. The device is characterized in that a support device is attached to the part to be suspended at the base of the worker's forearm.

The present invention will be explained in detail below based on embodiments shown in the drawings.

In the embodiment shown in FIG. 1, 1 is a main body having approximately the same length as the worker's forearm A (FIG. 4), and includes a box 7 containing a crank (not shown), etc., and a movable cylinder 8. The cutting tool 3 comprises an outer cylinder 9 and a holder 10 rotatably supported by the outer cylinder 9 and supporting the cutting tool 3 in a reciprocating but non-rotatable manner.

Reference numeral 2 denotes a prime mover such as a gasoline engine attached to the base of the main body 1, and is attached to the lower part of the box 7, for example.

Reference numeral 3 denotes a cutting tool that is reciprocatably attached to the tip of the main body 1, and can be formed, for example, by attaching a shaft 12 with a rectangular cross section to a flat blade portion 11 whose tip is formed into a concave arc shape.

A hole 13 with a square cross section is provided through the holder 10, and the square shaft 12 is slidably inserted through the hole 13.

In order to prevent the cutting tool 3 from falling off the holder 10, a position regulating pin 14 is attached to the holder 10, and a recess 15 is formed in a portion of the square shaft 12 corresponding to the pin 14.

Further, the holder 10 is rotatably attached to the outer cylinder 9 by forming the base end 16 of the holder 10 to have a large diameter and screwing the bossed flange 17 to the outer cylinder 9.

Furthermore, a free piston 18 is slidably inserted into the movable cylinder 8.

At the tip 20 of the striking rod 19 of this free piston 18.

The shaft end 21 of the cutting tool 3 is configured to be able to be struck.

The rotational driving force of the prime mover 2 is converted into reciprocating motion by a crank or the like, causing the movable cylinder 8 to reciprocate and the free piston 18 to reciprocate at high speed.

The striking action of the free piston 18 actuates the cutting tool 3 to perform the desired operation.

In the above embodiment, as described above, the crank, the movable cylinder 8
．． Since the striking mechanism 6 consisting of the free piston 18 and the like is used, the holder 10 to the cutting tool 3 and the movable cylinder 8 to the free piston 18 are not always linked, and as described above, the shaft 12 of the cutting tool 3 A holder 10 supported so as to be slidable only in the axial direction is rotatably attached to the front end of the outer cylinder 9, so that the cutting tool 3 is substantially rotated relative to the main body 1. However, it does not have any negative effect on the pruning performance of the pruning machine.

Reference numeral 4 is suspended by the worker's forearm A, and is attached to the proximal end side of the main body 1 to rotate an inverted U-shaped metal fitting 4a back and forth to the box 7 using a pivot pin 22. Can be installed and configured as desired.

Reference numeral 5 denotes a grip attached to a continuous portion of the holder 10; 1, for example, a grip body 5a having a brim-shaped upper end 23 is fixed to a mounting shaft 24 extending obliquely upward and forward from the holder 10; Can be done.

In the embodiment shown in FIG. 2, an electric motor 2 is used as a power source, an inverted metal fitting 4b is used as the support 4, and a gripping rod 5 is held on the holder 10 using a mounting fitting 25. It has the following characteristics.

In addition to the above-mentioned embodiments, the support 4 can also be constructed using an annular member into which the forearm A can be inserted.

The embodiment shown in FIG.
The holder 10 is rotatably fitted into the holder 10, and the square shaft 12 of the cutting tool 3 is fitted into the square hole 13 of the holder 10 so as to be slidable in the axial direction. A raised part 2T is formed to freely accommodate the pusher fitting 26, and the iron part 2
7 is screwed onto a shaft portion 28 on which the thread of the gripping rod 5 is formed.

Therefore, when the gripping rod 5 is tightened, the pressing force of the gripping rod 23 is applied to the holder 10 via the pusher 26.

The holder 10 is locked to the extension 9a, and when the grip 5 is loosened, the holder 10 becomes rotatable relative to the extension 9a, so the angle of the cutting tool 3 around the axis relative to the grip 5 can be freely selected. You can do pruning work by doing this.

When performing pruning work using the device of the present invention, one worker passes the base of the forearm A through the support 4 and grips the rod 5 with the hand R on the same side, as shown in FIG. Support the machine by holding it, and use the other hand to hold the trunk, etc. to ensure your own safety while performing pruning work.

As mentioned above, the device of the present invention can be reliably supported with only one arm,
Moreover, the worker's forearm A and the machine body are in a parallel and integral relationship, allowing the worker to perform the desired work accurately and quickly.

Further, unlike the device shown in FIG. 5, a strong vertical moment P is not generated, improving operability, reducing operator fatigue, and allowing long hours of work to be carried out easily.

or. The holder 10 to which the grip 5 is attached is rotatable with respect to the main body 1, and the cutting tool 3 cannot be rotated relative to the holder 10.
The cutting tool 3 can be operated in a direction around the desired axis by gripping and rotating the cutting tool 3 around the axis, which also allows the pruning machine of the present invention to be worn integrally on the forearm of the worker as described above. This allows the cutting tool to be quickly and efficiently guided parallel to the bark in order to strike branches extending in all directions perfectly along the trunk.

Furthermore, the device of the present invention directly connects the prime mover 2, etc. and the main body 1, and does not require a long transmission shaft or operation tube like the device shown in Fig. 5, so vibration generation is drastically reduced and vibration-proofing measures can be taken. This is extremely advantageous in terms of anti-vibration measures, while also reducing power loss.

In addition, the operator can support the machine body by suspending the support 4 with only the forearm A, and carry the machine body to a predetermined height using a ladder or the like, while leaving both hands R2L free. Therefore, pruning work can be performed without being restricted by the height of the object (branch) to be cut, and the machine body can be carried to a predetermined height position while ensuring safety.

[Brief explanation of drawings]

1 to 4 show an embodiment of the present invention, FIG. 1 is a partially cutaway front view thereof, FIG. 2 is a front view of another embodiment, and FIG. 3 is a front view of another embodiment.
The figure is a cross-sectional view of yet another embodiment. FIG. 4 is a perspective view showing the state of use of the device of the present invention;
FIG. 5 is a perspective view showing the state of use of the device of the previously applied application, which was invented by the present inventor. 1... Main body, 2... Prime mover or electric motor, 3... Curved cutting tool, 4... Support tool, 5...
... Clenched rod, A... curved forearm.

Claims (1)

[Scope of utility model registration request] A movable cylinder 8 reciprocally driven by a power source is fitted into an outer cylinder 9 of the branching machine main body 1, and a free piston 18 is inserted into the hole provided at the tip of the movable cylinder 8 with a striking rod 19 at the tip thereof. The movable cylinder 8 is fitted into the movable cylinder 8 so as to protrude from the movable cylinder 8, and is caused by the elastic force of the pneumatic chamber formed by the inner wall of the movable cylinder 8 and the free piston 18, which occurs when the movable cylinder 8 is reciprocated. In this pruning machine, the free piston 18 is reciprocated at high speed, and the striking rod 19 of the free piston 18 strikes the shaft end 21 of the cutting tool 3 provided at the front end of the branching machine main body 1. a cylindrical holder 10 in which the shaft 12 of the tool 3 is rotatably attached to the front end of the outer cylinder 9;
The cutting tool 3 is attached to the tip of the branching machine body 1 by being supported so as to be slidable only in the axial direction and not rotated, while the gripping rod 5 is attached to the continuous part of the holder 10. At the same time, a support 4, which is suspended at the base of the worker's forearm, is attached to a connecting part of the main body at a distance from the grip 5 to the rear of the worker's forearm, which is approximately the same length as the worker's forearm. Machine.